Crack is a drug of rapid absorption that causes instant impact on the overall health of users and causes clinical and psychiatric compromise. This book covers the use of the drug by children and adolescents and the consequences due to substance use by parents or guardians. The work brings together ten chapters and it is based on the results of two researches conducted by the Oswaldo Cruz Foundation. The authors work in different fields of knowledge and give the work an interdisciplinary view on the subject. They seek to identify how many and who are these young people and then draw a profile, and also reflect on existing forms of care in some Brazilian cities.